Centrifugal cream-separator.



PATENTED JULY 2,1907.

P. L. KIMBALL. l

cBNTRIPU-GAL CREAM sEPAiR-ATOBLV APIFLIUATIONv FILED JAH. 26,'1906. I

3' SHEETS-SHEET 1.

WITNEEEEE Nin-859,185.

' PATENTE JULY 2, w07A P. L. KIMBALL. GENTMPUGAL @BEAM SBPARATQR.

APPLIUATION FILED JANZB 3 SHEBT-SHEET 2 No. S59v185.

PTENTEE JULY 2g MNE?. P. KIMBALL, TTRFUGL CREAM SEPBA w Ddl APPLICATION FILED JN. Z6, 1908.

3 SHHETS-BHEET 3,

UNTTED STATES PATENT FFTE.-

PERLEY L. KIMBALL, OF BELLOWS FALLS, VER-MONT, AISSIGNOR TO` VERMONT FARM MACHINE COMPANY, OF BELLOWS FALLS, VERMONT, ACORPORATION OF VERMONT.

CENTRIFUGAL C13/EALMS-SIE'.E'ARATOR.

Specification of Letters Patent.

:Patented July 2, 1907.

Application filed January 26, 1906. Serial No. 298,049.

To all whom it 'may concern:

Be it known that I, PERLEY L. KIMBALL, a citizen of the United States oi America, residing at Bellows Falls, in the county of Windham and State of Vermont, have invented certain Improvements in Centrifugal Cream-separators, of which the following is a specification.

This invention relates to improvements in centrifugal cream-separators such as that described and shown in U. S. Letters Patent No. 806,346, dated December 5, 1905, and it consists in an improved construction of the liquid Subdividers within the bowl, and in the simpliication of the construction of the parts through which the separated cream and skimmilk are withdrawn from the bowl and discharged from the apparatus. These improvements are specifically set forth in the following description and illustrated in the accompanying drawings, whereinl Figure 1 is a central vertical section ot the apparatus with all its parts in normal operative position; Fig.` 2 is a plan of the under side oi the cover as seen when removed from the bowl; Fig. 3 is a plan of the top of a disk which is interposed between the cover and the 4liquid Subdividers in the bowl; Fig. 4 is a plan of a single subdivider, removed from the bowl; Fig. 5 is an elevation of two Subdividers in their normal interlocked position; Fig. 6 is a vdiametrical vertical section of a single subdivider such as shown in Fig. 4; Figs. 7, 8, 9 and 10 are details showing modifications in the construction of the means by which the several blades ofthe Subdividers are held 'together and permanently spaced.

Referring to the drawings, the bowl A upon the spindle B, the feed-tube a having a base-plate b perforated at b2 secured near its lower end and axially radial wings g attached to its exterior, the passages for the whole milk in the tube beneath the plate b a boss b projecting up from the bottom oi the-bowl, over which the lower end of the feed-tube fits, and also a slot in the lower end of this tube which engages a pin pin the bottom of the bowl to prevent independent turning of the tube and plate therein, are all the same as shown in said Patent No. -806,346 and are not claimed herein.

The novel features are in the construction of the cover C, with a `chambered `neck c provided at its lower'end with an annular diaphragm c2 which, as shown, is substantially continuous with the base of the cover and has a central opening for the feed-tube a which closely fits it. liquid Subdividers in the bowl, is an annular disk D, the central opening in which also closely tits the feedtube a.. The diameter of the disk is substantially the same as that of the interior of the bowl and an annulargroove c3 is formed in the downwardly projecting Below the cover-base and between it and the#y flange ofthe cover opposite to the peripheral edgeot` p the disk D, when in normal position, for the passage oi the skimmilk upward around thc edge of the disk and then inward along the spaces between the diskand the cover-base. From the under side of the diaphragmk c2, a continuous rib c4 projects; as illustrated ther/outline ot' this rib is annular and is located a little within the peripheral circle oi the lower end of the chamber c of the neck. This continuous rib, however, may be oi any polygonal form in circumferential outline if desired, and serve the same purpose.

In th upper surface of the disk D is a strip of packing material d of the same outline as and coincident with the rib c4, so that when the cover and disk are in normal operative position, the rib d* will bear upon the packing strip d and form a cream chamber e between the diaphragm c2 and disk, around the feed-tube a, closed from the skimmilk passages. l,Vithin the area of the Cham'- ber e an adjustable cream outlet is provided through the disk D. This outlet consists of a screw-plug f with a hole f located eccentrically therein. Through the diaphragm c2, also within the area. of the chamber e, a

cream passage is formed and this is connected by a closed tube t with the cream discharge opening g in the side oi the neck below its upper edge, which in `this construction is the location of the final discharge of the skimmilk. lf desired, the rib c4 may be formed upon the upper side of the disk D and the packing strip d inserted in the under side of the diaphragm c, and the two will then serve the purpose oi forming a cream chamber equally well. Through the diaphragm vc2, but outside the periphery of the rib c4, a series of holes h are provided for the passage of the skimmilk from the space between the cover-base and the disk D into the chamber c of 'the neck, from which chamber the skimmilk is finally discharged over the upper. edge of the plates, which have sometimes been called the liner oi the bowl and which facilita-te the separation of the cream from the blue-milk within the bowl, consist of a number of interlocking liquid lsubdividers, individually made up of a, series of parallel blades t' longitudinally in the form of involute curves, similar to those shown in said Patent No. 806,346; butin place of a flat annular plate to which such blades are secured upon each side, the several blades are made `wider, and each plate is attached to the one adjacent thereto upon each side, by rigid connecting devices 7c which are secured to two adjacent blades, at intervals along their.

length and throughout the series of blades. Various forms of such connecting devices are available for the purpose, details oi some of which are illustrated in Figs. 7 to 10..; but the preferable form for simplicity and econonly of construction is that shown in Fig. 7 and also emneck. lnthis improved construction the division-' bodied in the structures illustratedv in Figs. 1, y4, 5,- 6;

- for, by placing two of these thin metal pieces 7c together, inserting their respective narrow projecting ends through coincident holes in adjacent blades t' and turning the ends of the respective pieces in opposite directions upagainst the sides ofthe blades, they will be firmly held together and lpermanently spaced at the location of each pair of connecting pieces; and as these are placed ait proper intervals throughout the series of blades. each subdivider will become a firm, durable structure, and when the blades of each are interlocked with those of another, the connecting pieces l: will serve as fixed abutments for the free lateral edges of the.

blades, 1h e same as though there was a continuous plate. The interior-ly 4threaded thimbl'es or spacing rings with a screw-pin to pass through the blaues shown in Fig. 8, the screws With hollow threaded heads shown in Fig. 9, or the spacing rings with dowel ends, to be headed up onthe blades shown in Fig. l0, may be used for connecting the blades, but they will be found more .expensive and less desirable for the purpose than the flat clenching pieces. After the connecting pieces ,have been secured to the blades, each subdivider may be treated with a tinning solution, which will tend to lill-all interstices and act as solder, to secure the parts more firmly together. l

In order to give-greater stability and firmness to the inner ends of the blades of each subdivider, I'prefer to secure a narrow i'lat'annulus my to the inner. ends of the blades, and in the same horizontal plane with the connecting pieces la, in the respective Subdividers; this annul'us. also serves as a rigid bearing for each subdivider upon the wings g when in proper position Within the bowl. The narrow ring m and the connecting pieces k between the blades give a more open subdivider and freer passage for the liquid which is being acted upon, than that ot the prior construction.

An annular perforated flange z is provided upon the under side of thedisk D. similar to that upon the under side of the inner division of the cover in the Patent No.

806,346, to bear upon the uppermost subdivider and hold the interlocked stack of subdividers firm` v in posii tion when the machine is in operation.

I claim: i

1. In a centrifugal cream-separator. a cover having an annular' base and a tubular neck with an annular' diaphragm therein` an annular disk of substantially the same diameter as the interior periphery of the bowl, between the cover and liquid Subdividers in the bowl` with skim-milk passages between the disk and the cover-base, an annular projection and coincident packing strip respectively upon the adjacent opposed surfaces of the annular diaphragm and the disk, :t series of skimmilk passages located without the circumference of the annular projection and extending through the diaphragm into the tubular neck. cream passages through the disk and diaphragm within the circumference of the annular projection and packing strip. and a cream discharge in the tubular neck below the skimmilk discharge opening therein.

2. In a centrifugal Creamseparator, a cover having a chambered neck with a diaphragm'across its lower end, a disk within the bowl between the liquid Subdividers and the cover. a cream chamber between the disk. and the diaphragm. closed 'from the skimmilk passages a creamopening through the disk into such closed chamber, and a cream outlet passage from the closed chamber rthrough the diaphragm.

3. In a centrifugal cream-separaton a cover' having a chambered neck with :1 diaphragm across its lower end, a disk within the bowl between the liquid sulldivders and `the cover, a cream chamberbetween the disk and the diaphragm. closed from the skimmilk passages a cream opening through the disk into the closed chamber. and a cream outlet passage from such closed chamber through the diaphra'gm to a discharge opening in the neick.

4. A subdivider for use in the bowl of a centrifugal cream-separatory consisting of a series of parallel blades,

each longitudinally in the form of an involute curve, and

securely attached to those immediately adjacent thereto on both sides thereof by separate rigid connecting devices secured at intervals along the length of the blade, substantially in a plane et right angles to .the axis of the subdivider.

PERLEY L. KIMBALL.

AWitnessex.:

R. C. BIDwnLL, F. C. HrLDnnTH. 

